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March 30, 2017

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6. Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1 moles ratio. What volume of compound D is to be added?

  • chemistry - ,

    I expect you will never get this answered, at least on this board, until you have determined what kind of ratio you want. Is that 4:1 by grams or by moles?.

  • chemistry - ,

    by moles

  • chemistry - ,

    25g C/550 = estimated 0.05 and that dissolved in 100 mL = 0.05/0.1 = about 0.5M.
    You take 1 mL of that so you have
    0.5 x 0.001L = 5E-4 and that times 4 = about 20E-4.
    Then 20E-4/0.075M for D = ?L and convert to mL.

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